Comment by plywoodShadow

The better question is: what is the net gain for the overall system? If PIM reduces the net thermal load and power consumption of the system for the same workload, then it’s a win regardless of where the heat sinks end up. The customers Samsung has in mind for this today are not limited to commodity designs. They’re using novel designs with each new hardware generation, so moving heat sinks around is not a deal-breaker.